X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/blobdiff_plain/4371275b6337ea3ae513f1c19463f8b4745d89d8..d200d8ca4e666defd3609ab2a8e058a20c419607:/hmcfgusb.c

diff --git a/hmcfgusb.c b/hmcfgusb.c
index 7ec0714..5939dd6 100644
--- a/hmcfgusb.c
+++ b/hmcfgusb.c
@@ -29,6 +29,7 @@
 #include <math.h>
 #include <poll.h>
 #include <errno.h>
+#include <sys/time.h>
 #include <libusb-1.0/libusb.h>
 
 #include "hexdump.h"
@@ -139,13 +140,33 @@ static libusb_device_handle *hmcfgusb_find() {
 	return NULL;
 }
 
+int hmcfgusb_send_null_frame(struct hmcfgusb_dev *usbdev)
+{
+	int err;
+	int cnt;
+
+	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, NULL, 0, &cnt, USB_TIMEOUT);
+	if (err) {
+		fprintf(stderr, "Can't send data: %s\n", usb_strerror(err));
+		return 0;
+	}
+
+	return 1;
+}
+
 int hmcfgusb_send(struct hmcfgusb_dev *usbdev, unsigned char* send_data, int len, int done)
 {
 	int err;
 	int cnt;
+	struct timeval tv_start, tv_end;
+	int msec;
 
-	if (debug)
+	if (debug) {
 		hexdump(send_data, len, "USB < ");
+	}
+
+	gettimeofday(&tv_start, NULL);
+
 	err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, send_data, len, &cnt, USB_TIMEOUT);
 	if (err) {
 		fprintf(stderr, "Can't send data: %s\n", usb_strerror(err));
@@ -153,13 +174,21 @@ int hmcfgusb_send(struct hmcfgusb_dev *usbdev, unsigned char* send_data, int len
 	}
 
 	if (done) {
-		err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, send_data, 0, &cnt, USB_TIMEOUT);
-		if (err) {
-			fprintf(stderr, "Can't send data: %s\n", usb_strerror(err));
+		if (!hmcfgusb_send_null_frame(usbdev)) {
 			return 0;
 		}
 	}
 
+	gettimeofday(&tv_end, NULL);
+	msec = ((tv_end.tv_sec-tv_start.tv_sec)*1000)+((tv_end.tv_usec-tv_start.tv_usec)/1000);
+
+	if (msec > 100) {
+		if (debug)
+			fprintf(stderr, "usb-transfer took more than 100ms (%dms), this can lead to timing problems!\n", msec);
+	} else if (debug) {
+		fprintf(stderr, "usb-transfer took %dms!\n", msec);
+	}
+
 	return 1;
 }
 
@@ -218,6 +247,7 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 			if (cb_data && cb_data->dev && cb_data->dev->transfer) {
 				libusb_free_transfer(cb_data->dev->transfer);
 				cb_data->dev->transfer = NULL;
+				free(cb_data);
 			}
 			return;
 		}
@@ -232,6 +262,7 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 				if (cb_data && cb_data->dev && cb_data->dev->transfer) {
 					libusb_free_transfer(cb_data->dev->transfer);
 					cb_data->dev->transfer = NULL;
+					free(cb_data);
 				}
 
 				return;
@@ -245,6 +276,8 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 	if (err != 0) {
 		fprintf(stderr, "Can't re-submit transfer: %s\n", usb_strerror(err));
 		libusb_free_transfer(transfer);
+		cb_data->dev->transfer = NULL;
+		free(cb_data);
 	}
 }
 
@@ -281,6 +314,7 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	cb_data = malloc(sizeof(struct hmcfgusb_cb_data));
 	if (!cb_data) {
 		perror("Can't allocate memory for hmcfgusb_cb_data");
+		free(dev);
 		return NULL;
 	}
 
@@ -293,6 +327,8 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data);
 	if (!dev->transfer) {
 		fprintf(stderr, "Can't prepare async device io!\n");
+		free(dev);
+		free(cb_data);
 		return NULL;
 	}
 
@@ -300,6 +336,7 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	if (!usb_pfd) {
 		fprintf(stderr, "Can't get FDset from libusb!\n");
 		free(dev);
+		free(cb_data);
 		return NULL;
 	}
 
@@ -310,6 +347,8 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
 	dev->pfd = malloc(dev->n_usb_pfd * sizeof(struct pollfd));
 	if (!dev->pfd) {
 		perror("Can't allocate memory for poll-fds");
+		free(dev);
+		free(cb_data);
 		return NULL;
 	}